Articles written in Bulletin of Materials Science

    • In vitro bioactivity evaluation of $\alpha$-calcium sulphate hemihydrate and bioactive glass composites for their potential use in bone regeneration


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      To combine the self-setting property of $\alpha$-calcium sulphate hemihydrate ($\alpha$-CSH) with the bioactive property of bioactive glass (BG), BG was added into $\alpha$-CSH to prepare $\alpha$-CSH/BG composites. The in vitro bioactivity and cytocompatibility of the $\alpha$-CSH/BG composites were assessed by soaking the composites in simulated body fluid (SBF) andco-culturing with the osteoblasts, respectively. Formation of a bone-like apatite layer on the composite surface was studied by X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), scanning electron microscopy (SEM) andenergy-dispersive spectroscopy (EDS). Variations in ionic concentration and pH of the SBF solution were detected. The incorporation of BG into $\alpha$-CSH, effectively compensated for the pH decrease caused by the dissolution of $\alpha$-CSH and the ion exchange.Osteoblast-like cells (MG63) were cultured on the samples, and theMTTresults confirmed that the compositescontaining BG were more favourable for the proliferation of these cells. Hence, $\alpha$-CSH/BG composites might have great potential for the use as a bone regeneration material.

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